Wargaming Terrain Mat from a blanket

I have wanted a portable gaming board for some time. A few years back I bought one of the plastic boards from GW, painted it up and flocked it and had a few battles on it. But it was very heavy and not really portable, the two foot squares in a zip bag still take up a considerable space in your cupboard. In the end, I sold it because it was too big for my small space, but of course then I had